What is ISO

 

We discussed camera specifications and parts of the camera in the last blog. We will discuss some technical terms of the camera.
Let's start with ISO, what is ISO? most of you know what is ISO. ISO is one of the three pillars of photography (the other two being shutter speed and aperture), and it has a major effect on your images. 
There are some subtopics in ISO.
Let's learn one by one.

• What is ISO?
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• What is the Meaning of ISO?
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• Common ISO Values.
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• What is Base ISO?
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• Low vs High ISO Noise Visibility
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• How to Change ISO
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• What Camera ISO Should You Use?
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• When to Use Low ISO
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• When to Use High ISO
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• Minimizing Noise and Maximizing Image Quality.

What is ISO?

In very basic terms, ISO is simply a camera setting that will brighten or darken a photo. As you increase your ISO number, your photos will grow progressively brighter. For that reason, ISO can help you capture images in darker environments, or be more flexible about your aperture and shutter speed settings.

However, raising your ISO has consequences. A photo taken at too high of an ISO will show a lot of grain, also known as noise, and might not be usable. So, brightening a photo via ISO is always a trade-off. You should only raise your ISO when you are unable to brighten the photo via shutter speed or aperture instead (for example, if using a longer shutter speed would cause your subject to be blurry).

You can see here how does the brightness of the picture changes according to ISO. We can easily find the ISO value using a Light meters. We will discuss further topics in the next blog. 

Thank you.

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